.banner {
    background: url(../img/background.jpg) center center/6000px;
    height: 285px;
}

.banner .bannerall {
    width: 982px;
    height: 285px;
    margin: 0 auto;
    display: flex;
    background-color: #fff;
}

.banner .bannerall .btn {
    background: url(../img/banner\ \(1\).png);
    display: block;
    position: absolute;
    top: 50%;
    font-size: 64px;
    color: #fff;
    width: 37px;
    height: 63px;
    margin-top: -100px;
    /* text-indent: -9999px; */
}

.btn1 {
    background-position: 0 -360px;
    left: 64px;
}

.btn2 {
    right: 55px;
    background-position: 0 -508px;
}

.banner .bannerall .banner_left {
    overflow: hidden;
}

.banner .bannerall .banner_left img {
    height: 285px;
    width: 736px;
}

.banner_1 {
    /* overflow: hidden; */
    width: 732px;
    display: flex;
}


/* .banner_1 .b_item {} */

.banner .bannerall .banner_right a {
    display: block;
    width: 253px;
    height: 100%;
    background: url(../img/download.png);
}

.banner .bannerall .banner_right p {
    margin: -31px auto;
    text-align: center;
    color: #8d8d8d;
}